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Novel poly(aryl ether nitrile ketone) foams and the influence of copolymer structure on the foaming result
Author(s) -
Zhao Jiyong,
Wang Zhipeng,
Wang Honghua,
Zhou Guangyuan
Publication year - 2018
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.5661
Subject(s) - nitrile , copolymer , blowing agent , ether , supercritical fluid , polymer , solubility , materials science , ketone , polymer chemistry , foaming agent , aryl , chemical engineering , composite material , organic chemistry , chemistry , alkyl , polyurethane , porosity , engineering
Novel poly(aryl ether nitrile ketone) foams were prepared through the batch foaming method with supercritical CO 2 as the blowing agent. Both temperature‐induced and pressure‐induced foaming methods were conducted to examine the influence of nitrile groups on the foaming result. The results indicated that nitrile groups influenced the foaming result by affecting both the viscoelasticity and CO 2 absorption of the polymers. In addition, the CO 2 solubility of the polymers increased with increasing CN content presumably because of the Lewis acid–base nature of the interaction between the CO 2 molecules and the nitrile groups. The cell growth process was assessed by analyzing the influence of foaming temperature and foaming time on the cell morphology. Nanocellular foams with a minimum size of 30–50 nm were achieved by the temperature‐induced foaming method. Moreover, highly expanded foams with a maximum expansion ratio of 23.6 were obtained by the pressure‐induced foaming method. © 2018 Society of Chemical Industry